Posted by Elizabeth on .
A 25-mL sample of 0.160M solution of NaOH is titrated with 17 mL of an unknown solution of H2SO4. What is the molarity of the sulfuric acid solution?
A. 0.004M H2SO4
B. 0.235M H2SO4
C. 0.117M H2SO4
D. 0.002M H2SO4
1. Write and balance the equation.
2NaOH + H2SO4 ==> Na2SO4 + 2H2O
2. mols NaOH = M x L = ?
3. Using the coefficients in the balanced equation, convert mols NaOH to mols H2SO4.
? mols NaOH x (1 mol H2SO4/2 mols H2SO4) = ? mols H2SO4.
4. Now convert mols H2SO4 and volume to M.
M = mols H2SO4/L H2SO4